Show not supported warning for e2e rooms.

vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailFragment.kt

@@ -674,13 +674,21 @@ class RoomDetailFragment @Inject constructor(
                 true
             }
             R.id.search              -> {
-                navigator.openSearch(requireContext(), roomDetailArgs.roomId)
+                handleSearchAction()
                 true
             }
             else                     -> super.onOptionsItemSelected(item)
         }
     }
 
+    private fun handleSearchAction() {
+        if (session.getRoom(roomDetailArgs.roomId)?.isEncrypted() == false) {
+            navigator.openSearch(requireContext(), roomDetailArgs.roomId)
+        } else {
+            showDialogWithMessage(getString(R.string.search_is_not_supported_in_e2e_room))
+        }
+    }
+
     private fun handleCallRequest(item: MenuItem) = withState(roomDetailViewModel) { state ->
         val roomSummary = state.asyncRoomSummary.invoke() ?: return@withState
         val isVideoCall = item.itemId == R.id.video_call